nickaster, nope, you can see, author keeps silence.
This bug is important as it forces to rewrite request to static file if file does not exist.

Originally, it should check if file does not exist and disable this rewrite rule, falling back to normal index.php processing. In this buggy version, it checks if prerendered file exists and then disable rewrite.

I simply negated this rule and everything works like a charm.
Doesn't it looks like your behaviour? Just clean your cache and if you will get more 404s with new NGINX config installed (obtained from "Install" section, this fix is for you).